UltiPanel was enabled, but technically, it is a REPRAP_DISCOUNT_SMART_CONTROLLER
Either configuration works on the machine. But we want it 'Right'.
Setup the Proportional Font spacing so columns line up nicer on PronterFace and Repetier Host.
* M421 Mesh Point Offset and misc. UBL clean up
Allow M421 to accept an offset as well as absolute value for a specified
mesh point.
And misc. UBL clean up to reduce redundent code.
* Better error checking for M421
* Fix M421 Y index bug
I just noticed.... We've had a Y index bug for who knows how long?
I think I forgot to Sync before I committed last time. Some UBL
changes did not stick.
Also, update the gMax configuaration.h file so other than unique numbers
and settings, it exactly matches the default configuration.h file.
* Restore LSF functionality
Some of the typo's persisted... Hopefully this gets them all fixed.
* Restore user's expectations of how G28 should behave
* Allow Nozzle size control with ornery host programs
* Correct over optimization of pre-initialized variables
NEAR_ZERO() works most of the time... But it leaves corner cases
uncovered. We need to explicitly check if these variables are +/-
infinity.
* Correct over optimization of pre-initialized variables
The Configuration.h file entries for BL-Touch have been updated to:
```cpp
//#define BLTOUCH
//#define BLTOUCH_DELAY 375 // (ms) Enable and increase if needed
//#define BLTOUCH_HEATERS_OFF // if defined the printer's heaters are
turned off during probe event
```